OKLAHOMA CITY (AP) — Tornadoes destroyed homes, overturned vehicles and stripped the bark from trees Monday as they churned across Oklahoma, part of a strong series of storms that hit the Plains.

At least two people died in weather so violent that forecasters declared a “tornado emergency” for communities in the path of one of the twisters.

Garvin County officials said a man believed to be in his upper 70s died when another tornado hit a home near Wynnewood, south of Oklahoma City. That storm, caught on video by several storm chasers, appeared white against the dark clouds of a supercell storm. In Johnston County, the sheriff’s office said a man was killed by a tornado near Connerville.